Then the optimal design of retrofit schemes for members required of being re-strengthened due to local strengthening is performed.

再次，对改造引起的需进行加固的构件进行了加固方案的优化设计。

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Then an example of retrofit techniques of steel truss bridge is introduced, in which the concept of damage control design is adopted introducing an girder floor isolation system and hysteretic damper.

另外，还例举说明了钢桁架桥的改造，其设计引入了震害控制的观念，采用了桁架桥板梁隔震系统和滞后减振装置。

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This paper introduces the design scheme of precipitator retrofit project of thermal power plant, discusses the methods and bases of rational optimization before and during retrofit.

介绍了火力发电厂除尘器改造工程的设计方案，论述了工程改造前及改造中如何做到合理优化的方法及依据。

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